Rolling bearing ring unit and method of producing a rolling bearing ring unit

The rolling bearing ring unit with an insulating element positioned to avoid mold form contact during manufacturing addresses electric current-induced damage, ensuring a high-quality and durable bearing ring unit with extended service life.

US20260168534A1Pending Publication Date: 2026-06-18AB SKF SKF PATENT DEPARTMENT
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
AB SKF SKF PATENT DEPARTMENT
Filing Date
2025-12-09
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

Electric current flow can damage bearing steel in electric vehicles, and existing solutions like isolating layers on bearings may not adequately protect against such damage, potentially leading to reduced service life.

⚗Method used

A rolling bearing ring unit with an electrically insulating element fixed to the bearing ring, where the insulating element is sized and positioned to avoid direct contact with the mold form during manufacturing, using projections to facilitate injection molding and ensure safe electrical insulation and assembly.

🎯Benefits of technology

The solution provides a high-quality rolling bearing ring unit with extended service life by preventing damage during manufacturing and ensuring effective electrical insulation, thus enhancing reliability and durability.

✦ Generated by Eureka AI based on patent content.

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Abstract

A rolling bearing ring unit includes a bearing outer ring having a raceway and an electrically insulating element fixed to the bearing ring. A first imaginary half-plane extends from the central axis of the bearing ring, and a second imaginary half-plane extends from the central axis and is angularly spaced from the first half-plane. The insulating element is formed such that a distance of any point on a section of the insulating element, which is located between the two half-planes, from the central axis is greater than half of a maximum diameter of the raceway. The bearing ring may be an inner ring with the insulating layer fixed to the inner ring and formed such that a radial distance between the raceway of the inner ring and the central axis is greater than a maximum radius of any point on a section of the insulating element about the central axis.
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